Alex

where A002485(n) and A002486(n) are integer sequences indexed by "n" and referenced in the OEIS.org
and "i", "j", "k", "l" - are some integers, together representing the set, and to be experimentally found separately for the each value of "n"...
Could my conjecture be proved analytically?
PS There is a alleged (but not proved) possibility, that for each "n" an infinite number of {"i", "j", "k", "l"} sets could be found... - so the question arises whether there is a relationship between some two parameters in a {"i", "j", "k", "l"} sets, so one of those parameters could then be eliminated from the conjectured by me formula, thus reducing the number of parameters (members in the set) in it from 4 to 3?

I suggest the following two formulas for Heegner numbers (see OEIS A003173):